Second DVI Port not working?

Hi,
I just purchased a HP Pavilion Slimline s5-1224 (windows 7 home premium) and an having problems hooking up 2 monitors via the built-in DVI outputs.
I have a monitor plugged into each of the DVI ports. The computer doesn't seem to detect any monitor plugged into the lower DVI port. I've tried switching a number of times; if a monitor is plugged into the top port, it works fine; if it's plugged into the bottom port, the computer doesn't detect it. I've tried going to the "screen resolution" menu to manually detect the second monitor, but hitting the "detect" button doesn't find the second monitor.
Is there some sort of trick to get dual-monitors working with this computer?
Thanks

Sharon43,
Please provide the brand and complete model numbers for the monitors you are trying to connect to your computer. Also indicate the exact methods you are using to connect the monitors.
As your HP Pavilion p6-2310 Desktop Computer has one DVI-D (digital only) output and one VGA (analog only) output, one monitor must support VGA input and the other monitor must support DVI-D input.
(#1) - DVI-D (digital) output (#2) - VGA (analog) output
The computer and monitors will need to be connected as follows;
Computer > DVI-D cable > Monitor #1
Computer > VGA cable > Monitor #2
Please click the white KUDOS star to show your appreciation
Frank
{------------ Please click the "White Kudos" Thumbs Up to say THANKS for helping.
Please click the "Accept As Solution" on my post, if my assistance has solved your issue. ------------V
This is a user supported forum. I am a volunteer and I don't work for HP.
HP 15t-j100 (on loan from HP)
HP 13 Split x2 (on loan from HP)
HP Slate8 Pro (on loan from HP)
HP a1632x - Windows 7, 4GB RAM, AMD Radeon HD 6450
HP p6130y - Windows 7, 8GB RAM, AMD Radeon HD 6450
HP p6320y - Windows 7, 8GB RAM, NVIDIA GT 240
HP p7-1026 - Windows 7, 6GB RAM, AMD Radeon HD 6450
HP p6787c - Windows 7, 8GB RAM, NVIDIA GT 240

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